SELECTIVE RE-EXECUTION OF INSTRUCTION STREAMS FOR RELIABILITY

The technology is generally directed to detecting silent data corruption by selectively re-executing instructions. A renamer may receive decoded instructions from an instruction cache. The renamer may identify one or more of the decoded instructions that can be performed out of order. The reorder buffer may be configured to track instructions that are to be reexecuted for purposes of computing their value a second time and comparing the value from the second computation with a value from a first computation. Prior to retiring, or completing, an instruction, an initial result of executing the instruction a first time may be compared with a re-execution result of re-executing the instruction a second or nth time. If the comparison indicates there is a different initial result than the re-execution result, an indication of possible silent data corruption may be generated for the instruction.